package main

import "fmt"

func main() {
   var a int = 20
   var b int = 10
   var c int = 15
   var d int = 5
   var e int;

   e = (a + b) * c / d;      // ( 30 * 15 ) / 5
   fmt.Printf("(a + b) * c / d 的值为 : %d\n",  e );

   e = ((a + b) * c) / d;    // (30 * 15 ) / 5
   fmt.Printf("((a + b) * c) / d 的值为  : %d\n" ,  e );

   e = (a + b) * (c / d);   // (30) * (15/5)
   fmt.Printf("(a + b) * (c / d) 的值为  : %d\n",  e );

   e = a + (b * c) / d;     //  20 + (150/5)
   fmt.Printf("a + (b * c) / d 的值为  : %d\n" ,  e );  
}